Side by side
| Conventional | Advanced treatment | |
|---|---|---|
| Parts | Tank + drain field | Tank + treatment unit + disposal field |
| Power | Usually none | Yes, for pumps or blowers |
| Field size | Larger | Often smaller |
| Up-front cost | Lower | Higher |
| Maintenance | Pump every few years | Regular service plus pumping |
| When used | Good soil, enough space | Small lots, shallow rock or groundwater, poor soil |
You may not get to choose
The soil evaluation and permit review often decide which type is required. Where both are allowed, a conventional system is usually simpler and cheaper.
Living with an advanced system
- Keep the power on to the unit
- Respond to alarms
- Keep up with service visits
Septic questions
Can I choose an advanced system even if not required?
Usually, yes, if the design and permit support it.
Do advanced systems last longer?
They protect the field better but have more parts to maintain.
Who services them?
Qualified service providers; maintenance is part of ownership.